By Sandor, Arthur G. Erdman

Sr/grad point textual content for a moment direction in mechanisms, kinematics or desktop dynamics.

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Additional resources for Advanced Mechanism Design: Analysis and Synthesis Vol. II

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FIGURE 2-7. Typical double-acting compressor cylinder (Source: DresserRand, Painted Post, New York). Design and Materials for Reciprocating Compressor Components 51 All cylinders can be modified to provide capacity control or to provide openings for clearance pockets and internal plug unloaders. Cylinder Materials Cylinders are made of material selected for the particular pressure and gas being handled. Variables which must be considered in the selection of materials include bore diameter, pressure differential, and the type of gas to be handled.

Crank End—Suction gas filling cylinder. POSITION 3. TOP DEAD CENTER Head End— Compression stroke complete. Discharge valve closes as piston leaves top dead center. Clearance volume filled with gas at discharge pressure. Crank End—Suction stroke complete. Intake valve closes; compression begins. $f I 0 p \{ iL S* I/ ]// pv t/ T> i CLEARANCE "C" <* HEAD ENO 1 Sj i T^ |""'J " " I J C I POSITION 4. HEAD END Head End— Clearance volume expanded to point where pressure in cylinder is slightly less than suction.

600 z 1 •"soo • * • t r'/ ,. ===: P T T*VWTT" M "n '11 ' Li. 4! THEORETICAL ANABATIC DISCHARGE . O*F . - INTAKE TEMPERATURE. H rl 11 11 o 106 200 SCO 400 AIR DISCHARGE PRESSURE—PSIA 9010 1, 60 FIGURE f-13. Theoretical adiabatic discharge temperature for air with 70°F intake temperature. Figure 1-14 shows the effect of staging on power requirements. 7 psia suction pressure. The data are theoretical, with intercooling to suction temperature between stages (perfect intercooling) and equal ratios for all stages, and are based on 70°F suction temperature.

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